Persistence is a silly marketing gimick for everything apart from SSL.. TROLL
malcolm.turnbull at crocus.co.uk
Mon Aug 12 16:35:55 BST 2002
SSL likes persistence so that it doesn't need to re-key for each
Nothing else needs it.
If you web server requires persistence (i.e. local sessions) then why on
earth bother with a load balancer.
END OF TROLL----
Jeff Warnica wrote:
| Im not at all an expert, but I dont see how this would be possible with
| LVS.. LVS works on a much lower level then any of apache/php/ssl session
| type information. IMNSHO that the director is blistfully unaware at the
| nature of the traffic its directing, and the real servers (can be)
| blistfully unaware that there in a cluster is a Good Thing.
| While Im sure there are situations in various enviroments that will
| always cause an unbalance (ie, on an intranet from a NAT'd office), the
| situations that I can imagine are somewhat self inflicted. NAT due to IP
| shortage is something of a hack, and if your (or your corps) hack
| confuses your director then you could consiter putting the director
| inside the NAT'd area.
| For public (ie, internet) servers, I cant see NAT induced inbalances
| substaining over a long time. (ie, no longer then some time related to
| the average web visit - time enough for eyeballs to leave your site and
| new eyeballs to be sent to a different RS).
| But I might have no idea what Im talking about.
| On Mon, 2002-08-12 at 12:14, Doug Schasteen wrote:
|>One of the features that I saw a lot when looking at commercial load
|>balancers was the ability to use persistence based on cookies, session
|>IDs, and ssl IDs instead of just IP addresses. The reason why is best
|>explained right here. If a lot of people work in an office that has only
|>one public IP address, then you get lots of load imbalance. Is it
|>possible for LVS to do persistence based on apache/php sessions? Or
|>based on SSL sessions, or anything like that? Of course, I don't know
|>how these types of persistence would help when balancing an e-mail
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